diff --git a/scripts/gitadmin/rebuild_gitadmin.php b/scripts/gitadmin/rebuild_gitadmin.php
index e158304abc..bb1a8bc69b 100755
--- a/scripts/gitadmin/rebuild_gitadmin.php
+++ b/scripts/gitadmin/rebuild_gitadmin.php
@@ -42,7 +42,7 @@ function handleSingleUserPHID(
     ->withPHIDs(array($userPHID))
     ->executeOne();
   if (!$user) {
-    return;
+    return array();
   }
 
   $keys = id(new PhabricatorUserSSHKey())->loadAllWhere(